Linear electromagnetic actuator
First Claim
1. A linear electromagnetic actuator for displacing a movable section including permanent magnets by a thrust force generated by allowing a current to flow through a coil of a fixed section, whereinsaid movable section has a first yoke for supporting said permanent magnets,said fixed section has a second yoke for supporting said coil facing said permanent magnets while being separated therefrom,a first projection and a second projection are formed on both sides of said first yoke protruding toward said second yoke and extending in a direction of displacement of said movable section,a third projection and a fourth projection are formed on both sides of said second yoke protruding toward said first yoke and extending along directions parallel to said first projection and said second projection,said first projection and said second projection are slightly separated from said second yoke,a first guide member is interposed between said first projection and said second yoke, anda second guide member is interposed between said second projection and said second yoke,wherein each of said first guide member and said second guide member is composed of a plurality of rolling members, and a part of said rolling members are first rolling members composed of magnetic members.
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Accused Products
Abstract
First and second projections are formed to protrude toward a guide rail from both sides of a slide table. Third and fourth projections are formed to protrude toward the slide table from both sides of the guide rail. A plurality of balls are arranged in clearances between the first and second projections and the third and fourth projections.
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Citations
16 Claims
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1. A linear electromagnetic actuator for displacing a movable section including permanent magnets by a thrust force generated by allowing a current to flow through a coil of a fixed section, wherein
said movable section has a first yoke for supporting said permanent magnets, said fixed section has a second yoke for supporting said coil facing said permanent magnets while being separated therefrom, a first projection and a second projection are formed on both sides of said first yoke protruding toward said second yoke and extending in a direction of displacement of said movable section, a third projection and a fourth projection are formed on both sides of said second yoke protruding toward said first yoke and extending along directions parallel to said first projection and said second projection, said first projection and said second projection are slightly separated from said second yoke, a first guide member is interposed between said first projection and said second yoke, and a second guide member is interposed between said second projection and said second yoke, wherein each of said first guide member and said second guide member is composed of a plurality of rolling members, and a part of said rolling members are first rolling members composed of magnetic members.
Specification